[Doc] Update getting_started.rst (#1814)
[Doc] Update getting_started.rst (#1814)

* Update getting_started.rst

Replacing command to install Sanic without uvloop as the provided one is not working (at least in my case)

* Same thing as oneliner

* Update getting_started.rst

Dummy commit for Travis
ashleysommer/sanic,ashleysommer/sanic,yunstanford/sanic,yunstanford/sanic,channelcat/sanic,ashleysommer/sanic,yunstanford/sanic,channelcat/sanic,channelcat/sanic,channelcat/sanic,yunstanford/sanic